Analysis and Design of a T-Compensation Network with Switch-Controlled Capacitor for Wireless Power Transfer System

This paper presents a T-compensation network (TCN) with switch-controlled capacitor (SCC) applied to a wireless power transfer (WPT) system. The control of active power can be achieved only by controlling the SCC without significantly increasing the reactive power demand on the secondary side. First, a generalized design approach of TCN with SCC is derived with a fundamental harmonic approximation (FHA)-based model. This design can reduce the reactive power exchange between the primary and secondary side caused by the power regulation to optimize the system operation. After that, the design method is further modified considering the effect of rectifier load. Simulation and experimental results prove the proposed TCN and its design approach.